Solve the system by the method of elimination.

infinite solutions along the line -3x+y = 6

Step-by-step explanation:

9x -3y = -18

-3x + y = 6

Multiply the second equation by 3

3( -3x+y) = 3*6

-9x +3y = 18

Add this to the first equation

9x -3y = -18

-9x +3y = 18

0 + 0  = 0

This means it is the same line which means there are infinite solutions along the line -3x+y = 6

work is shown and pictured

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2